Vaulted Roof Insulation

Foil faced iso board can be cost effective insulation for finished attics and cathedral ceilings.

Vaulted roof insulation. Foam board insulation would be a more economical especially if you are supplying the labor see photo. Solutions include pricier thinner batts with a higher insulating factor made especially for vaulted ceilings such as blown cellulose or more recently spray foam insulation an insulation that was specifically designed with hard to reach places in mind. In the knee wall area the insulation is in the floor and on the back of the knee wall. Stand on a ladder and using a caulk gun seal any areas where there is visible wiring or.

Continue installing baffles until baffles are. The higher the r value the. Spray foam is a very expensive option however. Cut and insert 1 or thicker high r foam insulation sheets r 8 per inch against the furring giving a 1 or greater air path between the insulation and the roof deck under the cathedral ceiling.

Once this happens the water drips into your insulation or soaks into the roof sheathing. Cathedral ceilings built using 2 x 12 roof rafters allow enough space for the fiberglass batt insulation and a 1 5 gap for ventilation. Once it gets into the attic space or the space between the roof and the ceiling of a cathedral ceiling the air cools rapidly and the water held in the air condenses on to a near by cold surface usually the underside of the roof or the roofing nails. When you can t do much about the roof one of the easiest and quickest ways to beef up the insulation on a ceiling like this is to add 1 to 2 inches of ridged foam insulation right over the drywall and then add more drywall.

Flat roof cathedral ceiling we re going to give it a try. Seal all ceiling openings. Nail 1 furring along every rafter side against the roof deck. During hot summer months heat can build up beneath the roof deck reducing shingle life and.

In most cases however insulation will not help prevent moisture problems. That prevents all the old stuff from falling out. How to install fiberglass insulation in vaulted ceilings r value. Below is 1x decking and 2x4 rafters.

Install baffles on vents. Also called vent chutes the baffles will make sure there is enough air flowing for. Insulation receives a rating based on its ability to reduce thermal transfer.